Security device utilizing conventional telephone lines

Details Security device utilizing conventional telephone lines Security device utilizing conventional telephone lines

1981-10-06

1985-01-15

Rubinson, Gene Z.

179 5R, 179 84VF, 179 90BD, H04M 1104

Patent

active

044939477

ABSTRACT:
A security device connected to telephone lines and to at least one sensor comprises a monitoring circuit for monitoring at least one sensor to determine a status of each sensor and to detect when the status of any sensor is a fault status, an automatic call-up circuit settable by the user of the device in accordance with a preselected telephone number to be called for automatically calling the preselected telephone number to report when any status comprises a fault status, and an answer circuit for receiving and answering any incoming telephone call received over the telephone line, and responsive to reception of a user input transmitted over the telephone lines, and designating a selected sensor to be monitored, for monitoring the sensor and transmitting the status of the sensor over the telephone line. Features of the invention include an automatic call-up circuit in which a preselected telephone number is preset and is automatically called in the event of a fault status, and an automatic answering circuit in which a deceiver ring signal is generated whenever a remote telephone is used to call the device over the telephone lines. Still further features of the invention include a device identifier transmission capability, a fault signal testing capability, an automatic call-up testing capability, an automatic hang-up capability, and use of a microphone to detect sounds in the environment in which the device is located, and to transmit the sounds over the telephone lines to the user.

REFERENCES:
patent: 3829616 (1974-08-01), Blouch
patent: 4095050 (1978-06-01), Beachem et al.
patent: 4121053 (1978-10-01), Dick
patent: 4284849 (1981-08-01), Anderson et al.
patent: 4371751 (1983-02-01), Hilligoss, Jr. et al.

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